package com.ruoyi.web.controller.system;

import java.util.List;
import java.util.Set;

import cn.hutool.core.codec.Base64Decoder;
import com.alibaba.fastjson2.JSONObject;
import com.ruoyi.common.config.WxAppConfig;
import com.ruoyi.common.core.domain.model.WxLoginBody;
import com.ruoyi.common.utils.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.domain.entity.SysMenu;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginBody;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.framework.web.service.SysLoginService;
import com.ruoyi.framework.web.service.SysPermissionService;
import com.ruoyi.system.service.ISysMenuService;
import org.springframework.web.client.RestTemplate;

import cn.hutool.crypto.Mode;
import cn.hutool.crypto.Padding;
import cn.hutool.crypto.symmetric.AES;

import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;


/**
 * 登录验证
 * 
 * @author ruoyi
 */
@RestController
public class SysLoginController
{
    @Autowired
    private SysLoginService loginService;

    @Autowired
    private ISysMenuService menuService;

    @Autowired
    private SysPermissionService permissionService;

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private WxAppConfig wxAppConfig;


    /**
     * 微信登录
     * @param wxLoginBody
     * @return
     */
    @PostMapping("/wxLogin")
    public AjaxResult wxLogin(@RequestBody WxLoginBody wxLoginBody)
    {
        AjaxResult ajax = AjaxResult.success();
        String code = wxLoginBody.getCode();
        String encryptedIv = wxLoginBody.getEncryptedIv();
        String encryptedData = wxLoginBody.getEncryptedData();
        //ajax.put(Constants.TOKEN, token);
        String url = "https://api.weixin.qq.com/sns/jscode2session?appid="+
                wxAppConfig.getAppId()+"&secret="+wxAppConfig.getAppSecret()+"&js_code="+
                code+"&grant_type=authorization_code";
        String res = restTemplate.getForObject(url,String.class);
        JSONObject json = JSONObject.parseObject(res);

        //获取key和openId
        String sessionKey = json.getString("session_key");
        String openId =  json.getString("openid");

        //解密
        String decryptResult =  decrypt(sessionKey,encryptedIv,encryptedData);
        if(StringUtils.hasText(decryptResult)){
            //解析成功
            String token = loginService.wxLogin(decryptResult);
            ajax.put(Constants.TOKEN, token);

        }else{
            return AjaxResult.error("微信登录失败！");
        }
        return ajax;
    }

    private String decrypt(String sessionKey,String encryptedIv,String encryptedData){
        try {
            byte[] encrypted64 = Base64Decoder.decode(encryptedData);
            byte[] key64 = Base64Decoder.decode(sessionKey);
            byte[] iv64 = Base64Decoder.decode(encryptedIv);
            AES aes = new AES(Mode.CBC, Padding.PKCS5Padding,
                    new SecretKeySpec(key64, "AES"),
                    new IvParameterSpec(iv64));
            byte[] decryptDataBase64 = aes.decrypt(encrypted64);
            return new String(decryptDataBase64, "UTF-8");
        } catch (Exception e) {
            return null;
        }

    }

    /**
     * 登录方法
     * 
     * @param loginBody 登录信息
     * @return 结果
     */
    @PostMapping("/login")
    public AjaxResult login(@RequestBody LoginBody loginBody)
    {
        AjaxResult ajax = AjaxResult.success();
        // 生成令牌
        String token = loginService.login(loginBody.getUsername(), loginBody.getPassword(), loginBody.getCode(),
                loginBody.getUuid());
        ajax.put(Constants.TOKEN, token);
        return ajax;
    }

    /**
     * 获取用户信息
     * 
     * @return 用户信息
     */
    @GetMapping("getInfo")
    public AjaxResult getInfo()
    {
        SysUser user = SecurityUtils.getLoginUser().getUser();
        // 角色集合
        Set<String> roles = permissionService.getRolePermission(user);
        // 权限集合
        Set<String> permissions = permissionService.getMenuPermission(user);
        AjaxResult ajax = AjaxResult.success();
        ajax.put("user", user);
        ajax.put("roles", roles);
        ajax.put("permissions", permissions);
        return ajax;
    }

    /**
     * 获取路由信息
     * 
     * @return 路由信息
     */
    @GetMapping("getRouters")
    public AjaxResult getRouters()
    {
        Long userId = SecurityUtils.getUserId();
        List<SysMenu> menus = menuService.selectMenuTreeByUserId(userId);
        return AjaxResult.success(menuService.buildMenus(menus));
    }
}
